US2424088A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Educational device for aerial gunners
Assignee: International Business Machines Corp
•
Filing: 1945-02-02
•
Granted: 1947-07-15
•
Expires: 1965-02-02
Abstract
No abstract record available.
Inventors
- 👤 Frank J Furman
- 👤 Eugene J Lamb
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 01:28
CPC Classifications
F; F41; F41G; F41G3/00; F41G3/26
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1724093A
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US1724092A
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US906924A
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US2047070A
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US2194141A
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US2089901A
Cited
US2210090A
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US2186545A
Cited
US2230149A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-07-14 | 1951-01-13 | 1951-07-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-07-14 | 1955-01-13 | 1955-07-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-07-14 | 1959-01-13 | 1959-07-15 | $7700.00 | Window Closed / Lapsed |